European Journal of Operational Research
European Journal of Operational Research > 2017 > 256 > 2 > 556-566
European Journal of Operational Research > 2017 > 263 > 2 > 596-610
European Journal of Operational Research > 2017 > 256 > 2 > 556-566
European Journal of Operational Research > 2017 > 263 > 2 > 596-610